Vehicular rearview mirror elements and assemblies incorporating these elements

  • US 7,570,413 B2
  • Filed: 05/08/2008
  • Issued: 08/04/2009
  • Est. Priority Date: 09/30/2002
  • Status: Active Grant
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First Claim
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1. An apparatus comprising:

  • a first substantially transparent substrate having first and second surfaces and a spectral filter material proximate the second surface in at least a peripheral portion, said spectral filter material comprising at least one layer including chromium;

    a second substrate having third and fourth surfaces and an at least partially reflective stack of materials on at least a portion of the third surface;

    said first substantially transparent substrate and said second substrate secured in a spaced apart relation with respect to one another with said second surface and said third surface facing one another,wherein said at least one layer including chromium is characterized by a refractive index, at approximately 550 nm, comprising n between approximately 2.7 and approximately 4.1, k between approximately 3.5 and approximately 4.5, and a ratio of n/k between 0.64 and 0.93.

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